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EP2140931B2 - Agitating machine with length-adjustable tool holder - Google Patents

Agitating machine with length-adjustable tool holder Download PDF

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Publication number
EP2140931B2
EP2140931B2 EP09005902.3A EP09005902A EP2140931B2 EP 2140931 B2 EP2140931 B2 EP 2140931B2 EP 09005902 A EP09005902 A EP 09005902A EP 2140931 B2 EP2140931 B2 EP 2140931B2
Authority
EP
European Patent Office
Prior art keywords
locking
sliding bar
tool
mixer according
slide holder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP09005902.3A
Other languages
German (de)
French (fr)
Other versions
EP2140931A1 (en
EP2140931B1 (en
EP2140931B9 (en
Inventor
Manfred Dr. Kirchner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Festool GmbH
Original Assignee
Festool GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Festool GmbH filed Critical Festool GmbH
Priority to PL09005902T priority Critical patent/PL2140931T3/en
Publication of EP2140931A1 publication Critical patent/EP2140931A1/en
Publication of EP2140931B1 publication Critical patent/EP2140931B1/en
Application granted granted Critical
Publication of EP2140931B9 publication Critical patent/EP2140931B9/en
Publication of EP2140931B2 publication Critical patent/EP2140931B2/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D1/108—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
    • F16D1/116—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling the interengaging parts including a continuous or interrupted circumferential groove in the surface of one of the coupling parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
    • B01F27/2121—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts composed of interconnected parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
    • B01F27/2124—Shafts with adjustable length, e.g. telescopic shafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
    • B01F27/213—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts characterised by the connection with the drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/50—Movable or transportable mixing devices or plants
    • B01F33/501—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use
    • B01F33/5011—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use portable during use, e.g. hand-held
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/008—Chucks; Expansion mandrels; Adaptations thereof for remote control with arrangements for transmitting torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/0806—Details; Accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/1215—Independent stirrer-drive units, e.g. portable or mounted on a wheelbarrow

Definitions

  • the invention relates to a stirring machine for stirring building material according to the preamble of claim 1.
  • the stirring machine has two axially spaced propeller arrangements.
  • a propeller assembly has a fixed distance to a housing of the stirring machine, while a second propeller assembly is disposed on a rod which is slidably received in a hollow tube.
  • the tool is off at one DE 44 40 566 C1
  • Known stirring a stirring tool for example, a stirring rod, which is received in the tool holder, for example screwed or inserted bayonet.
  • the free end of the stirring tool dips into the building material located in a mixing vessel, for example adhesive, gypsum or the like, and stirs it, for example, by adding water.
  • the mixing vessel is usually on the ground.
  • the total length consisting of stirring rod, tool receiving device and housing determines a working height of an operator. If the operator is small, this overall arrangement of the mixer is too high, too low for large operators. Overall, the handling is uncomfortable.
  • Construction material can be stirred with the stirrer.
  • the approach according to the invention is that the tool receiving device allows a simple length adjustment. This can be a convenient adaptation to the size of an operator's body.
  • the distance between the distal, free end of the tool and the housing is adjustable by means of the tool-receiving device according to the invention, so that the stirring machine is easy to handle.
  • the tool holder is preferably telescopic in the longitudinal direction.
  • the tool holder is displaceable relative to the output bracket by means of a push rod, which is accommodated in a sliding receptacle.
  • the push bar is received positively in the slide receptacle. Due to the positive locking the rotational drive is realized.
  • the slide receptacle has an at least partially polygonal inner contour and the push bar has an outer contour which fits in a form-fitting manner to this inner contour.
  • the inner contour is hexagonal and matching the outer contour.
  • the push rod can be added to the longitudinal determination frictionally in the sliding receptacle.
  • a clamping device for clamping and / or for longitudinal determination of the push rod is provided on the slide receptacle.
  • a transverse to the longitudinal direction movably mounted on the slide receptacle locking element and optionally a latching element is provided.
  • a latching of the push rod for longitudinal fixation preferably a Vorverrastung before locking, is possible.
  • the locking element or latching element is movable, for example, in a transverse to the longitudinal direction bore on the slide receptacle.
  • the locking element or locking element is a ball.
  • the respective locking element or latching element engages in a locking position in a locking receptacle or latching receptacle on the push rod and locks or locks them thus in the respective longitudinal position.
  • the push rod has a plurality of locking receptacles, which are spaced apart in the longitudinal direction. Also in the longitudinal direction spaced latching receptacles are appropriate.
  • the locking receptacles are for example spherical caps, constrictions or the like, in which the respective locking element can engage.
  • a locking element is already sufficient.
  • a plurality of locking elements are provided which have distances to one another in the circumferential direction of the sliding receptacle. The locking elements then engage from several sides in the locking receptacles on the push bar.
  • the stirring machine preferably has a slide on the sliding receptacle movable, rotatably or both mounted locking sleeve, with which the locking element or can be moved into its locking position or can, in which it or engages in the respective locking receptacle or intervention.
  • the sliding sleeve may advantageously be spring loaded in the locking position so that it automatically assumes the locking position when the operator releases it. By sliding and / or rotating the locking sleeve, the operator can unlock the locking position.
  • the locking sleeve takes an unlocked position.
  • the locking sleeve has expediently a receiving space for receiving the locking element in the unlocking position, in which the locking element is moved out of the respective locking receptacle and, accordingly, the push rod is displaceable in the sliding receptacle.
  • the locking element is displaced by moving the push rod into the receiving space of the locking sleeve.
  • sliding bevels are expediently provided on the locking receptacles on which the respective locking element can slide from the locking position into the unlocked position.
  • a nut could be provided which is screwed onto the component containing the sliding receptacle and when tightening the sliding receptacle for the push rod narrows, so that the push rod is fixed in the longitudinal direction.
  • the push rod is removable from the slide receptacle.
  • the push bar is removable from the slide receptacle.
  • the tool holder is expediently arranged on a front, free end of the push rod.
  • the sliding receptacle is advantageously a part of the output bracket, while the push rod forms part of the tool holder. It is understood that the reverse configuration would be possible.
  • the slide receptacle and the push rod are preferably fixed to the output bracket and the tool holder.
  • the tool holder can be, for example, a bayonet plug holder.
  • the tool holder has a screw thread for the tool. This is a particularly simple design.
  • a hand-held power tool 10 in the form of a stirring machine 11 has a housing 12 with a bottom side 13 in use, on which a tool receiving device 14 is arranged.
  • the tool receiving device 14 has a tool holder 15 for holding a tool 16, for example a stirring rod 17.
  • a drive motor 18 in the interior of the housing 12 drives, for example, via a gear 19, the tool receiving device 14 and ultimately held by this stirring rod 17 rotationally. With the help of a gear switch 20, the transmission 19 can be switched.
  • the hand-held power tool 10 is easily gripped by a handle assembly 21.
  • An attached to the housing 12 handle holder 22 projecting from the housing 12 supporting portions and arms holds, for example, a curved to the top of the housing 12 curved switch arm 23 and an open towards the bottom 13, U-shaped guide handle 24.
  • the guide handle 24 and the switch arm 23 arranged on opposite sides of the housing 12.
  • Side legs 27 of the guide handle 24 are fixed to the handle holder 22.
  • a transverse section 28 of the guide handle 24 extends on the upper side 29 of the hand-held machine tool 10 between the two side limbs 27.
  • the tool holder 15 is namely in a longitudinal direction 30 in which the tool holder 15 protrudes in front of the housing 12, for changing a distance 31 between a free end 32 of the tool 16 and the housing 12 telescoped.
  • stirring means 33 for example, R.vorsprünge, for stirring construction material 34 is present.
  • the inventively adjustable tool receiving device 14 makes it possible that the distance 31 is variable without the tool 16 must be replaced. That is, one and the same stirring rod 17 can remain on the hand-held power tool 10.
  • the operator of the hand-held machine tool 10 merely adjusts the longitudinal position of the tool holder 15 on the tool-receiving device 14 in order to be able to work comfortably. For example, a small operator shortens the distance 31, while a larger operator increases the distance 31.
  • An output bracket 35 of the tool receiving device 14 is rotatably connected to the drive motor 18 via the gear 19.
  • the output bracket 35 in turn holds the tool holder 15, which is arranged at the front, free end 36 of a push rod 37, rotatably.
  • the push rod 37 is slidably received in a sliding receptacle 38 of the output bracket 35 in the longitudinal direction 30.
  • the gear 20 drives a on a shaft 39 of the output bracket 35 rotatably mounted gear 40 at.
  • the gear 40 is rotatably connected to the shaft 39, for example by means of a feather key 41.
  • the gear 40 is located between an upper and a lower bearing 42, 43, the shaft 39 and thus the output bracket 35 rotatably support the housing 12.
  • a protective housing 44 which is attached to the bottom of the housing 12 or forms an integral part thereof. Furthermore, sealing means, for example a seal 45 penetrated by the shaft 39, are expediently provided to protect the movable components in the interior of the housings 12, 44.
  • a lower, in front of the housing 12 and the protective housing 44 projecting portion 46 of the shaft 39 is designed as a hollow shaft 47, the interior of which forms the sliding receptacle 38, in which the push rod 37 is slidably received along the longitudinal direction 30.
  • the push rod 37 has a hexagonal outer contour 48, which corresponds with a correspondingly also hexagonal inner contour 49 of the slide receptacle 38.
  • the two contours 48, 49 fit into each other in a form-fitting manner and thus realize a rotational drive.
  • the push bar 37 is a polygonal bar.
  • a screw nut 50 rotatably disposed, for example, shrunk, glued or welded, which provides the tool holder 15.
  • the tool holder 15 comprises a screw thread in which a mounting end 51 of the tool 16 is screwed until a flange 52 abuts below the mounting end 51 on the end face of the tool holder 15 and the nut 50.
  • the push rod 37 is fixed to the slide receptacle 38 by means of a locking device 53 in a plurality of longitudinal positions.
  • the locking device 53 is manually and without tools detachable and resealable or lockable.
  • the locking device 53 comprises a locking sleeve movably mounted on the hollow shaft 47 in the longitudinal direction 30.
  • a locking element 55 in the embodiment a ball - although other form-locking elements would be conceivable, e.g. Rolling or rolling -, between an unlocked position and a locking position, which is shown in Figure 2, adjustable.
  • the locking element 55 is guided in a guide channel 68, which extends in a peripheral wall of the hollow shaft 47 between the slide receptacle 38 and the outside of the hollow shaft 47.
  • the locking element 55 (it can also be provided a plurality of locking elements) engages in one of a plurality of spaced apart longitudinally 30 locking receptacles 56 on the push rod 37 a.
  • the locking receptacles 56 could be, for example, spherical caps, but are formed in the embodiment by running on the outer periphery of the push rod 37 annular grooves 57.
  • the locking sleeve 54 is by a spring 58 in the locking position ( FIG. 2 ) spring loaded.
  • the spring 58 is supported on the one hand on a longitudinal stop 59 of the output bracket 35 and on the other hand on the locking sleeve 54, for example on the end face or, as in the embodiment, on a locking projection 60. Partly the spring 58 is arranged protected in an interior of the locking sleeve 54.
  • the spring 58 loads the locking sleeve 54 such that the locking projection 60 presses the locking element 55 radially inward into one of the locking receptacles 56.
  • the locking projection 60 projects radially inward of the inner or inner wall of the locking sleeve 54.
  • the locking projection 60 is preferably annular, so that it does not depend on the rotational position of the locking sleeve 54 with respect to the shaft 39.
  • the spring 58 presses the locking sleeve 54 against a stop flange 61, which is arranged on the upper side of the nut 50 and protrudes radially outward of these.
  • the locking sleeve 54 strikes in the locking position with a stop 62 on its inner circumference against an annular stop 63, which is arranged on the outside at the lower, free end of the hollow shaft 47.
  • the locking device 53 is suitably protected by sealant from environmental influences.
  • sealants include, for example, a Protective cover 69 in the form of an elastic sleeve 64 which is disposed on the outside of the locking sleeve 54 and connected thereto.
  • a radially inwardly projecting driving projection 65 of the grommet 64 engages in a driving recess 66 on the outer circumference of the locking sleeve 54.
  • the spout 64 further extends to the annular stop 63 and extends at the other end to the longitudinal stop 59, where it strikes to form a bellows 67.
  • the bellows 67 allows the adjustment of the locking sleeve 54 between its unlocked position and its locking position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Accessories For Mixers (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

A work machine (11) has a working tool fastening device (14), especially for a stirring blade (17), driven by a drive motor (18) in a lengthwise direction (30) in front of a housing (12). The tool-fastening device (14) has a power output holder (35) rotationally joined to the drive motor (18) for retaining the tool holder (15) torsionally-tight in at least two lengthwise positions relative to the lengthwise direction (30) between the free end (32) of the tool (16) and the housing (12).

Description

Die Erfindung betrifft eine Rührmaschine zum Anrühren von Baumaterial gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a stirring machine for stirring building material according to the preamble of claim 1.

Aus US 2, 209, 287 geht z.B. eine solche Rührmaschine hervor. Die Rührmaschine weist zwei axial zueinander beabstandete Propelleranordnungen auf. Eine Propelleranordnung hat einen festen Abstand zu einem Gehäuse der Rührmaschine, während eine zweite Propelleranordnung an einem Stab angeordnet ist, der in einem Hohlrohr verschieblich aufgenommen ist.Out US Pat. No. 2,209,287 For example, such a stirring machine emerges. The stirring machine has two axially spaced propeller arrangements. A propeller assembly has a fixed distance to a housing of the stirring machine, while a second propeller assembly is disposed on a rod which is slidably received in a hollow tube.

Eine aus US 1,703,099 bekannte Rührmaschine gemäß dem Oberbegriff dem Anspruchs 1 hat eine Propelleranordnung, die am freien Ende eines Rührstabes angeordnet ist, der seinerseits in einer Hohlwelle der Rührmaschine teleskopierbar angeordnet ist.One out US 1,703,099 Known stirring machine according to the preamble of claim 1 has a propeller assembly which is arranged at the free end of a stirring rod, which in turn is arranged telescopically in a hollow shaft of the stirring machine.

Das Werkzeug ist bei einer aus DE 44 40 566 C1 bekannten Rührmaschine ein Rührwerkzeug, zum Beispiel ein Rührstab, der in der Werkzeugaufnahme aufgenommen ist, beispielsweise eingeschraubt oder bajonettartig eingesetzt ist. Das freie Ende des Rührwerkzeuges taucht in das in einem Anrührgefäß befindliche Baumaterial, beispielsweise Kleber, Gips oder dergleichen, ein und rührt dieses beispielsweise unter Zufügung von Wasser durch. Das Anrührgefäß steht in der Regel auf dem Boden. Somit bestimmt die Gesamtlänge bestehend aus Rührstab, Werkzeug-Aufnahmeeinrichtung und Gehäuse eine Arbeitshöhe eines Bedieners. Wenn der Bediener klein ist, ist diese Gesamtanordnung der Rührmaschine zu hoch, bei großen Bedienern zu niedrig. Insgesamt ist die Handhabung unkomfortabel.The tool is off at one DE 44 40 566 C1 Known stirring a stirring tool, for example, a stirring rod, which is received in the tool holder, for example screwed or inserted bayonet. The free end of the stirring tool dips into the building material located in a mixing vessel, for example adhesive, gypsum or the like, and stirs it, for example, by adding water. The mixing vessel is usually on the ground. Thus, the total length consisting of stirring rod, tool receiving device and housing determines a working height of an operator. If the operator is small, this overall arrangement of the mixer is too high, too low for large operators. Overall, the handling is uncomfortable.

Es ist daher die Aufgabe der vorliegenden Erfindung, eine Rührmaschine zu schaffen, bei der ein Abstand zwischen einem Gehäuse der Rührmaschine und einem freien Ende eines mit der Rührmaschine betriebenen, an der Werkzeugaufnahme anordenbaren Rührstabes einstellbar ist.It is therefore the object of the present invention to provide a stirring machine in which a distance between a housing of the stirring machine and a free end of an agitator operated, can be arranged on the tool holder stirring rod is adjustable.

Zur Lösung der Aufgabe ist eine Rührmaschine gemäß der technischen Lehre des Anspruchs 1 vorgesehen.To solve the problem, a stirring machine according to the technical teaching of claim 1 is provided.

Mit der Rührmaschine kann Baumaterial gerührt werden.Construction material can be stirred with the stirrer.

Der erfindungsgemäße Ansatz ist, dass die Werkzeug-Aufnahmeeinrichtung eine einfache Längenanpassung ermöglicht. Damit kann eine bequeme Anpassung an die jeweilige Körpergröße eines Bedieners erfolgen. Der Abstand zwischen dem distalen, freien Ende des Werkzeugs und dem Gehäuse ist mittels der erfindungsgemäßen Werkzeug-Aufnahmeeinrichtung einstellbar, so dass die Rührmaschine bequem handhabbar ist.The approach according to the invention is that the tool receiving device allows a simple length adjustment. This can be a convenient adaptation to the size of an operator's body. The distance between the distal, free end of the tool and the housing is adjustable by means of the tool-receiving device according to the invention, so that the stirring machine is easy to handle.

Die Werkzeugaufnahme ist in der Längsrichtung vorzugsweise teleskopierbar.The tool holder is preferably telescopic in the longitudinal direction.

Die Werkzeugaufnahme ist relativ zu der Abtriebshalterung mit Hilfe einer Schiebestange verschieblich, die in einer Schiebeaufnahme aufgenommen ist.The tool holder is displaceable relative to the output bracket by means of a push rod, which is accommodated in a sliding receptacle.

Die Schiebestange ist in der Schiebeaufnahme formschlüssig aufgenommen. Durch den Formschluss wird die Drehmitnahme realisiert.The push bar is received positively in the slide receptacle. Due to the positive locking the rotational drive is realized.

Die Schiebeaufnahme hat eine zumindest teilweise polygonale Innenkontur und die Schiebestange eine zu dieser Innenkontur formschlüssig passende Außenkontur. Wenn die Schiebestange in die Schiebeaufnahme eingesetzt ist, ist der Formschluss und somit die Drehmitnahme realisiert.The slide receptacle has an at least partially polygonal inner contour and the push bar has an outer contour which fits in a form-fitting manner to this inner contour. When the push rod is inserted in the slide receptacle, the positive locking and thus the rotational drive is realized.

Beispielsweise ist die Innenkontur hexagonal und dazu passend auch die Außenkontur.For example, the inner contour is hexagonal and matching the outer contour.

Die Schiebestange kann zur Längsfestlegung reibschlüssig in der Schiebeaufnahme aufgenommen sein.The push rod can be added to the longitudinal determination frictionally in the sliding receptacle.

Zweckmäßigerweise ist an der Schiebeaufnahme eine Klemmeinrichtung zum Klemmen und/oder zur Längsfestlegung der Schiebestange vorgesehen.Conveniently, a clamping device for clamping and / or for longitudinal determination of the push rod is provided on the slide receptacle.

Zur Längsfestlegung der Schiebestange an der Schiebeaufnahme ist ein quer zu der Längsrichtung beweglich an der Schiebeaufnahme gelagertes Verriegelungselement und optional ein Verrastungselement vorgesehen. Eine Verrastung der Schiebestange zur Längsfestlegung, vorzugsweise eine Vorverrastung vor der Verriegelung, ist möglich. Das Verriegelungselement oder Verrastungselement ist beispielsweise in einer quer zur Längsrichtung verlaufenden Bohrung an der Schiebeaufnahme beweglich. Vorzugsweise ist das Verriegelungselement oder Verrastungselement eine Kugel. Das jeweilige Verriegelungselement oder Verrastungselement greift in einer Verriegelungsposition in eine Verriegelungsaufnahme oder Rastaufnahme an der Schiebestange ein und verriegelt beziehungsweise verrastet diese somit in der jeweiligen Längsposition. Zur Realisierung von zwei oder weiteren Längspositionen ist vorgesehen, dass die Schiebestange mehrere Verriegelungsaufnahmen, die in Längsrichtung zueinander beabstandet sind, aufweist. Auch in Längsrichtung zueinander beabstandete Rastaufnahmen sind zweckmäßig.For longitudinal fixing of the push rod to the slide receptacle a transverse to the longitudinal direction movably mounted on the slide receptacle locking element and optionally a latching element is provided. A latching of the push rod for longitudinal fixation, preferably a Vorverrastung before locking, is possible. The locking element or latching element is movable, for example, in a transverse to the longitudinal direction bore on the slide receptacle. Preferably, the locking element or locking element is a ball. The respective locking element or latching element engages in a locking position in a locking receptacle or latching receptacle on the push rod and locks or locks them thus in the respective longitudinal position. For the realization of two or more longitudinal positions, it is provided that the push rod has a plurality of locking receptacles, which are spaced apart in the longitudinal direction. Also in the longitudinal direction spaced latching receptacles are appropriate.

Die Verriegelungsaufnahmen sind beispielsweise Kugelkalotten, Einschnürungen oder dergleichen, in die das jeweilige Verriegelungselement eingreifen kann.The locking receptacles are for example spherical caps, constrictions or the like, in which the respective locking element can engage.

Es versteht sich, dass im Prinzip ein Verriegelungselement bereits ausreicht. Vorteilhaft sind jedoch mehrere Verriegelungselemente vorgesehen, die in Umfangsrichtung der Schiebeaufnahme Abstände zueinander haben. Die Verriegelungselemente greifen dann von mehreren Seiten in die verriegelungsaufnahmen an der Schiebestange ein.It is understood that in principle a locking element is already sufficient. Advantageously, however, a plurality of locking elements are provided which have distances to one another in the circumferential direction of the sliding receptacle. The locking elements then engage from several sides in the locking receptacles on the push bar.

Zum Verstellen des Verriegelungselements oder der Verriegelungselemente weist die Rührmaschine vorzugsweise eine an der Schiebeaufnahme schiebebeweglich, drehbeweglich oder beides gelagerte Verriegelungshülse auf, mit der das oder die Verriegelungselemente in ihre Verriegelungsstellung verlagert werden kann oder können, bei der es beziehungsweise sie in die jeweilige Verriegelungsaufnahme eingreift beziehungsweise eingreifen.To adjust the locking element or the locking elements, the stirring machine preferably has a slide on the sliding receptacle movable, rotatably or both mounted locking sleeve, with which the locking element or can be moved into its locking position or can, in which it or engages in the respective locking receptacle or intervention.

Die Schiebehülse kann vorteilhaft in die Verriegelungsstellung federbelastet sein, so dass sie die Verriegelungsstellung automatisch einnimmt, wenn sie der Bediener loslässt. Durch Schieben und/oder Drehen der Verriegelungshülse kann der Bediener die Verriegelungsstellung aufheben.The sliding sleeve may advantageously be spring loaded in the locking position so that it automatically assumes the locking position when the operator releases it. By sliding and / or rotating the locking sleeve, the operator can unlock the locking position.

Dann nimmt die Verriegelungshülse eine Entriegelungsstellung ein. Die Verriegelungshülse hat zweckmäßigerweise einen Aufnahmeraum zur Aufnahme des Verriegelungselements in der Entriegelungsstellung, bei der das Verriegelungselement aus der jeweiligen Verriegelungsaufnahme herausbewegt ist und dementsprechend die Schiebestange in der Schiebeaufnahme verschieblich ist. Beispielsweise wird das Verriegelungselement durch Verschieben der Schiebestange in den Aufnahmeraum der Verriegelungshülse verlagert. An den Verriegelungsaufnahmen sind hierzu zweckmäßigerweise Gleitschrägen vorhanden, an denen das jeweilige Verriegelungselement von der Verriegelungsstellung in die Entriegelungsstellung entlanggleiten kann.Then the locking sleeve takes an unlocked position. The locking sleeve has expediently a receiving space for receiving the locking element in the unlocking position, in which the locking element is moved out of the respective locking receptacle and, accordingly, the push rod is displaceable in the sliding receptacle. For example, the locking element is displaced by moving the push rod into the receiving space of the locking sleeve. For this purpose, sliding bevels are expediently provided on the locking receptacles on which the respective locking element can slide from the locking position into the unlocked position.

Anstelle der vorgenannten Verriegelungshülse könnte auch beispielsweise eine Mutter vorgesehen sein, die auf das die Schiebeaufnahme enthaltende Bauteil aufgeschraubt ist und beim Festziehen die Schiebeaufnahme für die Schiebestange verengt, so dass die Schiebestänge in der Längsrichtung festgelegt ist.Instead of the aforementioned locking sleeve, for example, a nut could be provided which is screwed onto the component containing the sliding receptacle and when tightening the sliding receptacle for the push rod narrows, so that the push rod is fixed in the longitudinal direction.

Vorzugsweise ist die Schiebestange aus der Schiebeaufnahme entnehmbar. Somit ist es möglich, die Schiebestange gegen eine alternative, beispielsweise längere oder kürzere Schiebestange zur Längenanpassung der Gesamtkonfiguration anzupassen.Preferably, the push rod is removable from the slide receptacle. Thus, it is possible to adapt the push bar against an alternative, for example, longer or shorter push bar for length adjustment of the overall configuration.

Die Werkzeugaufnahme ist zweckmäßigerweise an einem vorderen, freien Ende der Schiebestange angeordnet.The tool holder is expediently arranged on a front, free end of the push rod.

Die Schiebeaufnahme ist vorteilhaft ein Bestandteil der Abtriebshalterung, während die Schiebestange einen Bestandteil der Werkzeugaufnahme bildet. Es versteht sich, dass auch die umgekehrte Konfiguration möglich wäre. Die Schiebeaufnahme und die Schiebestange sind vorzugsweise mit der Abtriebshalterung und der Werkzeugaufnahme fest verbunden.The sliding receptacle is advantageously a part of the output bracket, while the push rod forms part of the tool holder. It is understood that the reverse configuration would be possible. The slide receptacle and the push rod are preferably fixed to the output bracket and the tool holder.

Die Werkzeugaufnahme kann beispielsweise eine Bajonett-Steckhalterung sein. Vorzugsweise hat die Werkzeugaufnahme jedoch ein Schraubgewinde für das Werkzeug. Dies ist eine besonders einfache Bauweise.The tool holder can be, for example, a bayonet plug holder. Preferably, however, the tool holder has a screw thread for the tool. This is a particularly simple design.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung erläutert. Es zeigen:

Figur 1
eine teilweise geschnittene Vorderansicht einer erfindungsgemäßen Rührmaschine,
Figur 2
eine detailliertere Teilschnittansicht einer Werk- zeug-Aufnahmeeinrichtung der Rührmaschine gemäß Fi- gur 1, etwa entsprechend einem Ausschnitt A in Fi- gur 1, und
Figur 3
die Rührmaschine gemäß Figur 1 in perspektivischer Schrägansicht.
Hereinafter, an embodiment of the invention will be explained with reference to the drawing. Show it:
FIG. 1
a partially sectioned front view of a stirring machine according to the invention,
FIG. 2
a more detailed partial sectional view of a tool receiving device of the stirring machine according to Figure 1, approximately corresponding to a section A in Figure 1, and
FIG. 3
the stirrer according to FIG. 1 in perspective oblique view.

Eine Hand-Werkzeugmaschine 10 in Gestalt einer Rührmaschine 11 hat ein Gehäuse 12 mit einer bei Gebrauch unteren Unterseite 13, an dereine WerkzeugAufnahmeeinrichtung 14 angeordnet ist. Die WerkzeugAufnahmeeinrichtung 14 weist eine Werkzeugaufnahme 15 zum Halten eines Werkzeugs 16, beispielsweise eines Rührstabs 17, auf.A hand-held power tool 10 in the form of a stirring machine 11 has a housing 12 with a bottom side 13 in use, on which a tool receiving device 14 is arranged. The tool receiving device 14 has a tool holder 15 for holding a tool 16, for example a stirring rod 17.

Ein Antriebsmotor 18 im Innern des Gehäuses 12 treibt beispielsweise über ein Getriebe 19 die Werkzeug-Aufnahmeeinrichtung 14 und letztlich den durch diese gehaltenen Rührstab 17 rotatorisch an. Mit Hilfe eines Getriebeschalters 20 kann das Getriebe 19 geschaltet werden.A drive motor 18 in the interior of the housing 12 drives, for example, via a gear 19, the tool receiving device 14 and ultimately held by this stirring rod 17 rotationally. With the help of a gear switch 20, the transmission 19 can be switched.

Die Hand-Werkzeugmaschine 10 ist an einer Griffanordnung 21 bequem ergreifbar. Ein am Gehäuse 12 befestigter Griffhalter 22 mit vom Gehäuse 12 abstehenden Tragabschnitten und Armen hält beispielsweise einen bogenförmig zur Oberseite des Gehäuses 12 gekrümmt verlaufenden Schalterarm 23 sowie einen zur Unterseite 13 hin offenen, U-förmigen Führungsgriff 24. Der Führungsgriff 24 und der Schalterarm 23 sind an einander entgegengesetzten Seiten des Gehäuses 12 angeordnet. Am freien Ende des Schalterarms 23 befindet sich ein Handgriff 25 mit einem Schalter 26 zum Einund Ausschalten des Antriebsmotors 18. Seitenschenkel 27 des Führungsgriffs 24 sind an dem Griffhalter 22 festgelegt. Ein Querabschnitt 28 des Führungsgriffs 24 erstreckt sich an der Oberseite 29 der Hand-Werkzeugmaschine 10 zwischen den beiden Seitenschenkeln 27. Ein Bediener ergreift die Rührmaschine in der Regel an dem oberen Querabschnitt 28 sowie dem Führungsgriff 24, die im oberen Bereich der Hand-Werkzeugmaschine 10 verlaufen. Für einen kleineren Bediener wäre es zwar prinzipiell möglich, die Hand-Werkzeugmaschine 10 auch an weiter unten liegenden Abschnitten der Griffanordnung 21 zu ergreifen, beispielsweise den Seitenschenkeln 27, am unteren Bereich des Schalterarms 23 oder gar am Griffhalter 22, Dies ist allerdings unbequem. Hier schafft die Erfindung Abhilfe:The hand-held power tool 10 is easily gripped by a handle assembly 21. An attached to the housing 12 handle holder 22 projecting from the housing 12 supporting portions and arms holds, for example, a curved to the top of the housing 12 curved switch arm 23 and an open towards the bottom 13, U-shaped guide handle 24. The guide handle 24 and the switch arm 23 arranged on opposite sides of the housing 12. At the free end of the switch arm 23 is a handle 25 with a switch 26 for switching on and off of the drive motor 18. Side legs 27 of the guide handle 24 are fixed to the handle holder 22. A transverse section 28 of the guide handle 24 extends on the upper side 29 of the hand-held machine tool 10 between the two side limbs 27. An operator typically grasps the agitator at the upper transverse section 28 and the guide handle 24 in the upper region of the hand-held machine tool 10 run. For a smaller operator, it would be possible in principle to take the hand-held machine tool 10 also at lower sections of the handle assembly 21, for example, the side legs 27, at the bottom of the switch arm 23 or even on the handle holder 22. However, this is inconvenient. Here the invention remedy:

Die Werkzeugaufnahme 15 ist nämlich in einer Längsrichtung 30, in der die Werkzeugaufnahme 15 vor das Gehäuse 12 vorsteht, zur Veränderung eines Abstandes 31 zwischen einem freien Ende 32 des Werkzeugs 16 und dem Gehäuse 12 teleskopierbar. An dem freien Ende 32 sind schematisch dargestellte Rührmittel 33, beispielsweise Rührvorsprünge, zum Rühren von Baumaterial 34 vorhanden.The tool holder 15 is namely in a longitudinal direction 30 in which the tool holder 15 protrudes in front of the housing 12, for changing a distance 31 between a free end 32 of the tool 16 and the housing 12 telescoped. At the free end 32 are shown schematically stirring means 33, for example, Rührvorsprünge, for stirring construction material 34 is present.

Die erfindungsgemäß längenverstellbare Werkzeug-Aufnahmeeinrichtung 14 ermöglicht es, dass der Abstand 31 veränderbar ist, ohne dass das Werkzeug 16 ausgetauscht werden muss. Das heißt, es kann ein und derselbe Rührstab 17 an der Hand-Werkzeugmaschine 10 verbleiben. Der Bediener der Hand-Werkzeugmaschine 10 verstellt lediglich die Längsposition der Werkzeugaufnahme 15 an der Werkzeug-Aufnahmeeinrichtung 14, um komfortabel arbeiten zu können. Beispielsweise verkürzt ein kleiner Bediener den Abstand 31, während ein größerer Bediener den Abstand 31 vergrößert.The inventively adjustable tool receiving device 14 makes it possible that the distance 31 is variable without the tool 16 must be replaced. That is, one and the same stirring rod 17 can remain on the hand-held power tool 10. The operator of the hand-held machine tool 10 merely adjusts the longitudinal position of the tool holder 15 on the tool-receiving device 14 in order to be able to work comfortably. For example, a small operator shortens the distance 31, while a larger operator increases the distance 31.

Eine Abtriebshalterung 35 der Werkzeug-Aufnahmeeinrichtung 14 ist mit dem Antriebsmotor 18 über das Getriebe 19 drehverbunden. Die Abtriebshalterung 35 wiederum hält die Werkzeugaufnahme 15, die am vorderen, freien Ende 36 einer Schiebestange 37 angeordnet ist, drehfest. Die Schiebestange 37 ist in einer Schiebeaufnahme 38 der Abtriebshalterung 35 in der Längsrichtung 30 verschieblich aufgenommen. Dadurch ist die Teleskopierbarkeit realisiert.An output bracket 35 of the tool receiving device 14 is rotatably connected to the drive motor 18 via the gear 19. The output bracket 35 in turn holds the tool holder 15, which is arranged at the front, free end 36 of a push rod 37, rotatably. The push rod 37 is slidably received in a sliding receptacle 38 of the output bracket 35 in the longitudinal direction 30. As a result, the telescoping is realized.

Das Getriebe 20 treibt ein an einer Welle 39 der Abtriebshalterung 35 drehfest angeordnetes Zahnrad 40 an. Das Zahnrad 40 ist beispielsweise mittels einer Passfeder 41 drehfest mit der Welle 39 verbunden. Das Zahnrad 40 befindet sich zwischen einem oberen und einem unteren Lager 42, 43, die die Welle 39 und somit die Abtriebshalterung 35 drehbar am Gehäuse 12 lagern.The gear 20 drives a on a shaft 39 of the output bracket 35 rotatably mounted gear 40 at. The gear 40 is rotatably connected to the shaft 39, for example by means of a feather key 41. The gear 40 is located between an upper and a lower bearing 42, 43, the shaft 39 and thus the output bracket 35 rotatably support the housing 12.

Die vorgenannten Komponenten, nämlich die Lager 42, 43, das Zahnrad 40 und dergleichen andere Antriebsbauteile der Hand-Werkzeugmaschine 10, sind durch ein Schutzgehäuse 44, das unten am Gehäuse 12 angesetzt ist oder einen integralen Bestandteil desselben bildet, geschützt. Ferner sind zweckmäßigerweise Dichtungsmittel, beispielsweise eine Dichtung 45, die von der Welle 39 durchdrungen ist, zum Schutz der beweglichen Komponenten im Innern der Gehäuse 12, 44 vorgesehen.The aforementioned components, namely the bearings 42, 43, the gear 40 and the like other drive components of the hand-held power tool 10 are protected by a protective housing 44 which is attached to the bottom of the housing 12 or forms an integral part thereof. Furthermore, sealing means, for example a seal 45 penetrated by the shaft 39, are expediently provided to protect the movable components in the interior of the housings 12, 44.

Ein unterer, vor das Gehäuse 12 und das Schutzgehäuse 44 vorstehender Abschnitt 46 der Welle 39 ist als Hohlwelle 47 ausgestaltet, deren Innenraum die Schiebeaufnahme 38 bildet, in der die Schiebestange 37 entlang der Längsrichtung 30 verschieblich aufgenommen ist.A lower, in front of the housing 12 and the protective housing 44 projecting portion 46 of the shaft 39 is designed as a hollow shaft 47, the interior of which forms the sliding receptacle 38, in which the push rod 37 is slidably received along the longitudinal direction 30.

Die Schiebestange 37 hat eine hexagonale Außenkontur 48, die mit einer entsprechend ebenfalls hexagonalen Innenkontur 49 der Schiebeaufnahme 38 korrespondiert. Somit passen die beiden Konturen 48, 49 formschlüssig ineinander und realisieren so eine Drehmitnahme. Die Schiebestange 37 ist eine Mehrkantstange.The push rod 37 has a hexagonal outer contour 48, which corresponds with a correspondingly also hexagonal inner contour 49 of the slide receptacle 38. Thus, the two contours 48, 49 fit into each other in a form-fitting manner and thus realize a rotational drive. The push bar 37 is a polygonal bar.

Am freien Ende 36 der Schiebestange 37 ist eine Schraubmutter 50 drehfest angeordnet, beispielsweise aufgeschrumpft, angeklebt oder angeschweißt, die die Werkzeugaufnahme 15 bereitstellt. Die Werkzeugaufnahme 15 umfasst ein Einschraubgewinde, in das ein Montageende 51 des Werkzeugs 16 eingeschraubt ist, bis ein Flansch 52 unterhalb des Montageendes 51 an die Stirnseite der Werkzeugaufnahme 15 beziehungsweise der Schraubmutter 50 anschlägt.At the free end 36 of the push rod 37 is a screw nut 50 rotatably disposed, for example, shrunk, glued or welded, which provides the tool holder 15. The tool holder 15 comprises a screw thread in which a mounting end 51 of the tool 16 is screwed until a flange 52 abuts below the mounting end 51 on the end face of the tool holder 15 and the nut 50.

Die Schiebestange 37 ist an der Schiebeaufnahme 38 mittels einer Verriegelungseinrichtung 53 in mehreren Längspositionen festlegbar. Die Verriegelungseinrichtung 53 ist manuell und ohne Werkzeug lösbar sowie wieder verschließbar oder verriegelbar.The push rod 37 is fixed to the slide receptacle 38 by means of a locking device 53 in a plurality of longitudinal positions. The locking device 53 is manually and without tools detachable and resealable or lockable.

Die Verriegelungseinrichtung 53 umfasst eine in der Längsrichtung 30 beweglich auf der Hohlwelle 47 verschieblich gelagerte Verriegelungshülse. Mit der Verriegelungshülse 54 ist ein Verriegelungselement 55, beim Ausführungsbeispiel eine Kugel - wobei auch andere Formschluss-Verriegelungselemente denkbar wären, z.B. Rollen oder walzen -, zwischen einer Entriegelungsstellung und einer Verriegelungsstellung, die in Figur 2 dargestellt ist, verstellbar. Das Verriegelungselement 55 ist in einem Führungskanal 68 geführt, der sich in einer Umfangswand der Hohlwelle 47 zwischen der Schiebeaufnahme 38 und der Außenseite der Hohlwelle 47 erstreckt.The locking device 53 comprises a locking sleeve movably mounted on the hollow shaft 47 in the longitudinal direction 30. With the locking sleeve 54 is a locking element 55, in the embodiment a ball - although other form-locking elements would be conceivable, e.g. Rolling or rolling -, between an unlocked position and a locking position, which is shown in Figure 2, adjustable. The locking element 55 is guided in a guide channel 68, which extends in a peripheral wall of the hollow shaft 47 between the slide receptacle 38 and the outside of the hollow shaft 47.

In der Verriegelungsstellung greift das Verriegelungselement 55 (es können auch mehrere Verriegelungselemente vorgesehen sein) in eine von mehreren, in Längsrichtung 30 zueinander beabstandeten Verriegelungsaufnahmen 56 an der Schiebestange 37 ein. Die Verriegelungsaufnahmen 56 könnten beispielsweise Kugelkalotten sein, sind jedoch beim Ausführungsbeispiel durch am Außenumfang der Schiebestange 37 verlaufende Ringnuten 57 gebildet.In the locking position, the locking element 55 (it can also be provided a plurality of locking elements) engages in one of a plurality of spaced apart longitudinally 30 locking receptacles 56 on the push rod 37 a. The locking receptacles 56 could be, for example, spherical caps, but are formed in the embodiment by running on the outer periphery of the push rod 37 annular grooves 57.

Die Verriegelungshülse 54 ist durch eine Feder 58 in die Verriegelungsstellung (Figur 2) federbelastet. Die Feder 58 stützt sich einerseits an einem Längsanschlag 59 der Abtriebshalterung 35 und andererseits an der Verriegelungshülse 54 ab, beispielsweise an deren Stirnseite oder, wie beim Ausführungsbeispiel, an einem Verriegelungsvorsprung 60. Teilweise ist die Feder58 in einem Innenraum der Verriegelungshülse 54 geschützt angeordnet.The locking sleeve 54 is by a spring 58 in the locking position ( FIG. 2 ) spring loaded. The spring 58 is supported on the one hand on a longitudinal stop 59 of the output bracket 35 and on the other hand on the locking sleeve 54, for example on the end face or, as in the embodiment, on a locking projection 60. Partly the spring 58 is arranged protected in an interior of the locking sleeve 54.

Die Feder 58 belastet die Verriegelungshülse 54 derart, dass der Verriegelungsvorsprung 60 das Verriegelungselement 55 nach radial innen in eine der Verriegelungsaufnahmen 56 drückt. Der Verriegelungsvorsprung 60 steht nach radial innen vor die Innenseite oder Innenwand der Verriegelungshülse 54 vor. Der Verriegelungsvorsprung 60 ist vorzugsweise ringförmig, so dass es auf die Drehposition der Verriegelungshülse 54 bezüglich der Welle 39 nicht ankommt.The spring 58 loads the locking sleeve 54 such that the locking projection 60 presses the locking element 55 radially inward into one of the locking receptacles 56. The locking projection 60 projects radially inward of the inner or inner wall of the locking sleeve 54. The locking projection 60 is preferably annular, so that it does not depend on the rotational position of the locking sleeve 54 with respect to the shaft 39.

Die Feder 58 drückt die Verriegelungshülse 54 gegen einen Anschlagflansch 61, der an der Oberseite der Schraubmutter 50 angeordnet ist und vor diese nach radial außen vorsteht. Zudem schlägt die Verriegelungshülse 54 in der Verriegelungsstellung mit einem Anschlag 62 an ihrem Innenumfang gegen einen Ringanschlag 63 an, der auf der Außenseite am unteren, freien Ende der Hohlwelle 47 angeordnet ist.The spring 58 presses the locking sleeve 54 against a stop flange 61, which is arranged on the upper side of the nut 50 and protrudes radially outward of these. In addition, the locking sleeve 54 strikes in the locking position with a stop 62 on its inner circumference against an annular stop 63, which is arranged on the outside at the lower, free end of the hollow shaft 47.

Die Verriegelungseinrichtung 53 ist zweckmäßigerweise durch Dichtmittel vor Umwelteinflüssen geschützt. Diese Dichtmittel umfassen beispielsweise eine Schutzhülle 69 in Gestalt einer elastischen Tülle 64, die auf der Außenseite der Verriegelungshülse 54 angeordnet und mit dieser verbunden ist. Beispielsweise greift ein nach radial innen vorstehender Mitnahmevorsprung 65 der Tülle 64 in eine Mitnahmeausnehmung 66 am Außenumfang der Verriegelungshülse 54 ein. Die Tülle 64 erstreckt sich ferner bis zum Ringanschlag 63 und erstreckt sich am anderen Ende bis zu dem Längsanschlag 59, an dem sie unter Bildung eines Balges 67 anschlägt. Der Balg 67 ermöglicht den Verstellweg der Verriegelungshülse54 zwischen ihrer Entriegelungsstellung und ihrer Verriegelungsstellung.The locking device 53 is suitably protected by sealant from environmental influences. These sealants include, for example, a Protective cover 69 in the form of an elastic sleeve 64 which is disposed on the outside of the locking sleeve 54 and connected thereto. For example, a radially inwardly projecting driving projection 65 of the grommet 64 engages in a driving recess 66 on the outer circumference of the locking sleeve 54. The spout 64 further extends to the annular stop 63 and extends at the other end to the longitudinal stop 59, where it strikes to form a bellows 67. The bellows 67 allows the adjustment of the locking sleeve 54 between its unlocked position and its locking position.

gestrichenpainted

Claims (14)

  1. Mixer in the form of a hand-operated power tool (10) for the mixing of building material (34), with a tool holding device (14) with a tool holder (15) extending in a longitudinal direction (30) in front of a housing (12) of the mixer (11) and drivable through a drive motor (18), wherein the hand-operated power tool (10) may be held conveniently at a handle section (21), wherein the tool holding device (14) has an output support (35) rotationally connected to the drive motor (18) for the non-rotatable holding of the tool holder (15) in at least two longitudinal positions relative to the longitudinal direction (30) to change a clearance (31) between a free end (32) of the tool (16) and the housing (12), wherein the tool holder (15) is movable relative to the output support (35) by means of a slide holder (38) and a sliding bar (37) which slides axially in the slide holder (38) in the longitudinal direction (30), characterised in that it has at its free end a stirring rod (17) with mixing means (33), for example mixing projections, for mixing the building material (34), that the tool holder (15) is designed to accommodate and hold the stirring rod (17), that the sliding bar (37) is held positively in the slide holder (38) and that the slide holder (38) has an at least partly polygonal inside contour (49) and the sliding bar (37) has an outside contour (48) which fits positively with the inside contour (49), wherein it has a locking device (53) to fix the sliding bar (37) to the slide holder (38) in at least two longitudinal positions and which has a locking element (55) movably mounted on the slide holder (38) at right-angles to the longitudinal direction (30), wherein the sliding bar (37) has, in at least two longitudinal positions on the outside contour (48) which positively matches the inside contour (49), locking locations (56) for the locking element (55), for locking the sliding bar (37) to the slide holder (38).
  2. Mixer according to claim 1, characterised in that the tool holder (15) is telescopic in the longitudinal direction (30).
  3. Mixer according to claim 1 or 2, characterised in that the sliding bar (37) is held in the slide holder (38) by frictional locking.
  4. Mixer according to any of the preceding claims, characterised in that in particular that the inside contour (49) and the outside contour (48) are hexagonal.
  5. Mixer according to any of the preceding claims, characterised in that the sliding bar (37) is a polygonal bar.
  6. Mixer according to any of the preceding claims, characterised in that it has a latching device and/or a clamping device for fixing the sliding bar (37) to the slide holder (38). In at least two longitudinal positions.
  7. Mixer according to claim 1 or 6, characterised in that the locking device (53) and/or the latching device is spring-loaded in a locking position which locks the sliding bar (37) or in a latching position in which the sliding bar (37) is engaged.
  8. Mixer according to claim 6 or 7, characterised in that the latching device has has a latching element movably mounted on the slide holder (38) at right-angles to the longitudinal direction (30), and that the sliding bar (37) has, in at least two longitudinal positions, latching locations for the latching element, for latching the sliding bar (37) to the slide holder (38).
  9. Mixer according to any of the preceding claims, characterised in that the locking device (53) has on the slide holder (38) a sliding and/or rotatably mounted locking sleeve (54) to adjust the locking element into a locking position in which it engages in the relevant locking location (56).
  10. Mixer according to claim 9, characterised in that the locking sleeve (54), mounted in particular in a protective sleeve (69), has a locating space to accommodate the locking element in a release position, in which the locking element is moved out of the respective locking location (56) and the sliding bar (37) may be moved into the slide holder (38).
  11. Mixer according to any of the preceding claims, characterised in that the sliding bar (37) is removable from the slide holder (38).
  12. Mixer according to any of the preceding claims, characterised in that the tool holder (15) is located at a front free end of the sliding bar (37).
  13. Mixer according to any of the preceding claims, characterised in that the slide holder (38) forms a constituent part of the output support (35) and the sliding bar (37) forms a constituent part of the tool holder (15).
  14. Mixer according to any of the preceding claims, characterised in that the tool holder (15) has a screw thread for the tool (16).
EP09005902.3A 2008-07-05 2009-04-29 Agitating machine with length-adjustable tool holder Active EP2140931B2 (en)

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PL09005902T PL2140931T3 (en) 2008-07-05 2009-04-29 Agitating machine with length-adjustable tool holder

Applications Claiming Priority (1)

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DE102008031839A DE102008031839A1 (en) 2008-07-05 2008-07-05 Hand machine tool with longitudinally adjustable tool holder

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EP2140931A1 EP2140931A1 (en) 2010-01-06
EP2140931B1 EP2140931B1 (en) 2011-08-24
EP2140931B9 EP2140931B9 (en) 2015-05-13
EP2140931B2 true EP2140931B2 (en) 2016-09-07

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AT (1) ATE521402T1 (en)
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DE102008031839A1 (en) 2010-01-07
ATE521402T1 (en) 2011-09-15
EP2140931A1 (en) 2010-01-06
PL2140931T3 (en) 2012-01-31
EP2140931B1 (en) 2011-08-24
EP2140931B9 (en) 2015-05-13

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